I'll start with my brief experience and then I'll make time soon to copy from a brochure I picked up about it.
In addition to my TKR adventures, my husband has had hip replacement adventures that weren't real fun. It didn't seem to help him gain ROM and then it started hurting. They did tests, but couldn't see anything wrong other than there was a slight shadow to the xray suggesting a shaft was loose. They went in and found infection, which postponed the revision surgery for 3 months, and finally when it was done, the PT he went to used theRed Cord therapy and in no time he had motion in his hip he hadn't known for about 5 years. He was ELATED!
That was about as much as I knew when I left the care of the home bound therapist that came to me for PT after my TKR. My surgeon (OS) told me to get out and find a facility with more tools to work with than I had in my home. My OS also gave me 2 weeks to show improvement or he'd need to schedule a manipulation (MUA.) At that point I only had (-5,75) ROM. My knee was STIFF.
The Red Cord PT at that point gave me 2 sessions and as I feared, my knee was not about to budge. She also gave me a muscle electrode stimulus device to use as long as I needed it. It has been an hour drive to get to their office, so I didn't jump right back there. Though my OS got it to (0,130) in the MUA procedure, 3 days later it had swollen and was (-15,90). It pretty much stayed there for the next month.
I've had PT closer to home in the interim, but I'm back to the Red Cord now and plan to be for the next month, maybe longer, while trying to decide if I might still need to consider scar tissue removal surgery. My ROM presently is finally back to, and up to (-5,105.) I'm not doing well with stairs, yet and I'm 7 months post op.
Red Cord utilizes a series of ropes, straps, bungies, belts and overhead pulleys and support beams that allows the trained therapist to really see which muscles are doing the work and which ones are leaning on others to do the work. The therapist then utilizes this information to target muscle exercises that strengthen, stretch and retrain them to do the work they should be doing. I rarely feel overworked in a session, but my muscles tend to tell me they've had a good workout the next day.
www.redcord.com has several photos of their bright red Norwegian designed apparatus in use. They are made in New Jersey in the US.